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https://www.readbyqxmd.com/read/27920640/intussuscepting-ampullary-adenoma-an-unusual-cause-of-gastric-outlet-obstruction-leading-to-cavitating-lung-lesions
#1
Simon J McCluney, Vickna Balarajah, Alex Giakoustidis, Joanne Chin-Aleong, Bryony Lovett, Hemant M Kocher
Ampullary adenomas are a rare clinical entity, occurring at a rate of 0.04-0.12% in the general population. They are premalignant lesions which have the capability to progress to malignancy, and they should be excised if they are causing immediate symptoms and/or are likely to degenerate to carcinoma. Intestinal intussusception in adults is rare and, unlike in children, is often due to a structural pathology. Intussuscepting duodenal/ampullary adenomas have been reported in the literature on 13 previous occasions, however never before with this presentation...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/27912131/preparation-of-a-magnetic-n-fe-ac-catalyst-for-aqueous-pharmaceutical-treatment-in-heterogeneous-sonication-system
#2
Nan Zhang, He Zhao, Guangming Zhang, Shan Chong, Yucan Liu, Liyan Sun, Huazhen Chang, Ting Huang
High efficiency and facile separation are desirable for catalysts used in water treatment. In this study, a magnetic catalyst (nitrogen doped iron/activated carbon) was prepared and used for pharmaceutical wastewater treatment. The catalyst was characterized using BET, SEM, XRD, VSM and XPS. Results showed that iron and nitrogen were successfully loaded and doped, magnetic Fe2N was formed, large amount of active surface oxygen and Fe(II) were detected, and the catalyst could be easily separated from water. Diclofenac was then degraded using the catalyst in ultrasound system...
November 29, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27911884/desorption-of-water-from-hydrophilic-mcm-41-mesopores-positron-annihilation-ftir-and-md-simulation-studies
#3
Priya Maheshwari, D Dutta, T Muthulakshmi, B Chakraborty, N Raje, P K Pujari
The desorption mechanism of water from the hydrophilic mesopores of MCM-41 was studied using positron annihilation lifetime spectroscopy (PALS) and attenuated total reflection Fourier transform infrared spectroscopy supplemented with molecular dynamics (MD) simulation. PALS results indicated that water molecules do not undergo sequential evaporation in a simple layer-by-layer manner during desorption from MCM-41 mesopores. The results suggested that the water column inside the uniform cylindrical mesopore become stretched during desorption and induces cavitation (as seen in the case of ink-bottle type pores) inside it, keeping a dense water layer at the hydrophilic pore wall, as well as a water plug at both the open ends of the cylindrical pore, until the water was reduced to a certain volume fraction where the pore catastrophically empties...
December 2, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/27911527/unraveling-the-anomalous-grain-size-dependence-of-cavitation
#4
J W Wilkerson, K T Ramesh
Experimental studies have identified an anomalous grain size dependence associated with the critical tensile pressure that a metal may sustain before catastrophic failure by cavitation processes. Here we derive the first quantitative theory (and its associated closed-form solution) capable of explaining this phenomena. The theory agrees well with experimental measurements and atomistic calculations over a very wide range of conditions. Utilizing this theory, we are able to map out three distinct regimes in which the critical tensile pressure for cavitation failure (i) increases with decreasing grain size in accordance with conventional wisdom, (ii) nonintuitively decreases with decreasing grain size, and (iii) is independent of grain size...
November 18, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27903839/the-effect-of-brain-tomography-findings-on-mortality-in-sniper-shot-head-injuries
#5
Çağdaş Can, M Bolatkale, A Sarıhan, Y Savran, A Ç Acara, M Bulut
OBJECTIVES: Penetrating gunshot head injuries have a poor prognosis and require prompt care. Brain CT is a routine component of the standard evaluation of head wounds and suspected brain injury. We aimed to investigate the effect of brain CT findings on mortality in gunshot head injury patients who were admitted to our emergency department (ED) from the Syrian Civil War. METHODS: The study group comprised patients who were admitted to the ED with gunshot brain injury...
November 30, 2016: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/27900529/effectiveness-of-pit-and-fissure-sealants-bonded-with-different-adhesive-systems-a-prospective-randomized-controlled-trial
#6
Gizem Erbas Unverdi, Stephan Atilla Atac, Zafer Cavit Cehreli
OBJECTIVES: To evaluate and compare the clinical retention of a resin-based fissure sealant placed with an intermediate layer of etch-and-rinse (ER) or self-etch (SE) adhesives. MATERIALS AND METHODS: Two hundred twenty-eight sealants were placed in 57 children with previously unsealed, caries-free permanent first molars, employing a split-mouth design. The teeth were randomized into four groups (n = 57 teeth/groups) according to the adhesive system placed under the tested sealant (Delton FS+; Dentsply)...
November 30, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27895946/a-case-of-false-positive-mycobacterium-tuberculosis-caused-by-mycobacterium-celatum
#7
Edward Gildeh, Zaid Abdel-Rahman, Ruchira Sengupta, Laura Johnson
Mycobacterium celatum is a nontuberculous mycobacterium shown to cause symptoms similar to pulmonary M. tuberculosis. Certain strains have been shown to cross-react with the probes used to detect M. tuberculosis, making this a diagnostic challenge. We present a 56-year-old gentleman who developed signs and symptoms of lung infection with computed tomography scan of the chest showing right lung apex cavitation. Serial sputum samples were positive for acid-fast bacilli and nucleic acid amplification testing identified M...
2016: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/27890986/correlation-of-chest-computed-tomography-findings-with-dyspnea-and-lung-functions-in-post-tubercular-sequelae
#8
Ananya Panda, Ashu Seith Bhalla, Raju Sharma, Anant Mohan, Vishnu Sreenivas, Umasankar Kalaimannan, Ashish Dutt Upadhyay
AIMS: To study the correlation between dyspnea, radiological findings, and pulmonary function tests (PFTs) in patients with sequelae of pulmonary tuberculosis (TB). MATERIALS AND METHODS: Clinical history, chest computed tomography (CT), and PFT of patients with post-TB sequelae were recorded. Dyspnea was graded according to the Modified Medical Research Council (mMRC) scale. CT scans were analyzed for fibrosis, cavitation, bronchiectasis, consolidation, nodules, and aspergilloma...
November 2016: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/27889502/role-of-lamellar-hole-associated-epiretinal-proliferation-in-lamellar-macular-holes
#9
Roberto dell'Omo, Gianni Virgili, Stanislao Rizzo, Serena De Turris, Giovanni Coclite, Dario Giorgio, Ermanno dell'Omo, Ciro Costagliola
PURPOSE: To compare the morphologic and functional characteristics and response to surgery of lamellar macular holes (LMHs) with and without lamellar hole-associated epiretinal proliferation (LHEP) and standard epiretinal membrane (ERM). DESIGN: Retrospective observational case series. METHODS: Setting: Vitreoretinal clinical practice. STUDY POPULATION: Eigthy-four eyes of 84 patients. The included eyes must present an irregular foveal contour and schitic or cavitated lamellar separation of neurosensory retina on spectral-domain optical coherence tomography (SD-OCT) and an area of increased autofluorescence on blue- fundus autofluorescence (B-FAF)...
November 23, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27887723/synergistic-effect-of-cavitation-and-agitation-on-protein-aggregation
#10
Tetsuo Torisu, Takahiro Maruno, Yoshinori Hamaji, Tadayasu Ohkubo, Susumu Uchiyama
It was recently reported that dropping induces protein aggregation due to the occurrence of cavitation. Agitation also causes protein aggregation. In this study, vials filled with antibody solution were subjected to a cycle of dropping and shaking using the friability testing apparatus to examine the combined effect of cavitation and agitation on protein aggregation. A cycle of dropping and shaking generated a massive amount of subvisible particles. Comparison of aggregation rate at different fill volumes indicated that shaking plays an important role in protein aggregation due to combination stress...
November 22, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27885172/isohydric-species-are-not-necessarily-more-carbon-limited-than-anisohydric-species-during-drought
#11
N Garcia-Forner, C Biel, R Savé, J Martínez-Vilalta
Isohydry (i.e., strong regulation of leaf water potential, Ψl) is commonly associated with strict stomatal regulation of transpiration under drought, which in turn is believed to minimize hydraulic risk at the expense of reduced carbon assimilation. Hence, the iso/anisohydric classification has been widely used to assess drought resistance and mortality mechanisms across species, with isohydric species being hypothetically more prone to carbon starvation and anisohydric species more vulnerable to hydraulic failure...
November 23, 2016: Tree Physiology
https://www.readbyqxmd.com/read/27885062/quantifying-risk-of-early-relapse-in-patients-with-first-demyelinating-events-prediction-in-clinical-practice
#12
Tim Spelman, Claire Meyniel, Juan Ignacio Rojas, Alessandra Lugaresi, Guillermo Izquierdo, Francois Grand'Maison, Cavit Boz, Raed Alroughani, Eva Havrdova, Dana Horakova, Gerardo Iuliano, Pierre Duquette, Murat Terzi, Pierre Grammond, Raymond Hupperts, Jeannette Lechner-Scott, Celia Oreja-Guevara, Eugenio Pucci, Freek Verheul, Marcela Fiol, Vincent Van Pesch, Edgardo Cristiano, Thor Petersen, Fraser Moore, Tomas Kalincik, Vilija Jokubaitis, Maria Trojano, Helmut Butzkueven
BACKGROUND: Characteristics at clinically isolated syndrome (CIS) examination assist in identification of patient at highest risk of early second attack and could benefit the most from early disease-modifying drugs (DMDs). OBJECTIVE: To examine determinants of second attack and validate a prognostic nomogram for individualised risk assessment of clinical conversion. METHODS: Patients with CIS were prospectively followed up in the MSBase Incident Study...
November 24, 2016: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/27884720/penetration-of-sub-micron-particles-into-dentinal-tubules-using-ultrasonic-cavitation
#13
N Vyas, R L Sammons, Z Pikramenou, W M Palin, H Dehghani, A D Walmsley
OBJECTIVES: Functionalised silica sub-micron particles are being investigated as a method of delivering antimicrobials and remineralisation agents into dentinal tubules. However, their methods of application are not optimised, resulting in shallow penetration and aggregation. The aim of this study is to investigate the impact of cavitation occurring around ultrasonic scalers for enhancing particle penetration into dentinal tubules. METHODS: Dentine slices were prepared from premolar teeth...
November 21, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27883130/nanobubbles-cavitation-shock-waves-and-traumatic-brain-injury
#14
Upendra Adhikari, Ardeshir Goliaei, Max L Berkowitz
Collapse of bubbles, microscopic or nanoscopic, due to their interaction with the impinging pressure wave produces a jet of particles moving in the direction of the wave. If there is a surface nearby, the high-speed jet particles hit it, and as a result damage to the surface is produced. This cavitation effect is well known and intensely studied in case of microscopic sized bubbles. It can be quite damaging to materials, including biological tissues, but it can also be beneficial when controlled, like in case of sonoporation of biological membranes for the purpose of drug delivery...
November 24, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27882294/cough-and-fever-in-an-immigrant-adolescent-with-abnormal-chest-x-ray
#15
Nicole Giles, Rajeev Bhatia
Tuberculosis (TB) remains a leading cause of death from infectious disease worldwide with 80,000 pediatric deaths annually. Disease caused by Mycobacterium tuberculosis (Mtb) is usually asymptomatic in pediatric patients and resolves after completion of standard therapy with isoniazid (INH). Rare reports document children greater than 10 years of age in endemic regions developing adult type cavitary disease, an infectious pulmonary tuberculosis lesion. This is a notable case of post-infectious pulmonary TB disease with adult type cavitation in an immigrant adolescent, which developed even after completing standard therapy with INH...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/27881031/cavitation-enhances-coagulated-size-during-pulsed-high-intensity-focussed-ultrasound-ablation-in-an-isolated-liver-perfusion-system
#16
Lu-Yan Zhao, Shan Liu, Zong-Gui Chen, Jian-Zhong Zou, Feng Wu
PURPOSE: To investigate whether cavitation enhances the degree of coagulation during pulsed high-intensity focussed ultrasound (HIFU) in an isolated liver perfusion system. METHODS: Isolated liver was treated by pulsed HIFU or continuous-wave HIFU with different portal vein flow rates. The cavitation emission during exposure was recorded, and real-time ultrasound images were used to observe changes in the grey scale. The coagulation size was measured and calculated...
November 24, 2016: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/27878197/an-anti-ultrasonic-stripping-effect-in-confined-micro-nanoscale-cavities-and-its-applications-for-efficient-multiscale-metallic-patterning
#17
Quan Xiang, Yiqin Chen, Zhiqin Li, Kaixi Bi, Guanhua Zhang, Huigao Duan
We report a method to reliably and efficiently fabricate high-fidelity metallic structures from a ten-nanometer to a millimeter scale based on an anti-ultrasonic-stripping (AUS) effect in confined micro/nanoscale cavities. With this AUS effect, metallic structures, which are surrounded by the pre-patterned closed templates, could be defined through selectively removing the evaporated metallic layer at the top and outside of the templates by ultrasonic-cavitation-induced stripping. Because only pre-patterned templates are required for exposure in this multiscale patterning process, this AUS-based process enables much smaller and more reliable plasmonic nanogaps due to the mitigated proximity effect and allows rapid fabrication of multiscale metallic structures which require both tiny and large structures...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27874110/molecular-thermodynamics-of-metabolism-hydration-quantities-and-the-equation-of-state-approach
#18
C Panayiotou, S Mastrogeorgopoulos, M Ataman, N Hadadi, V Hatzimanikatis
The present work is part of a series of papers aiming at a thorough understanding of the thermodynamics of metabolism over a broad range of external conditions. The focus here is on the systematic study of solvation/hydration of a variety of fluids via an equation-of-state approach. This approach permits the study not only of the overall free energy, enthalpy or entropy of hydration but also their key components from cavitation, charging, and solute conformations/solvent restructuring contributions. These latter components shed light into the mechanism of hydration and contribute to our understanding of solvation phenomena at remote conditions of temperature and pressure...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27873169/evaluation-for-the-efficacy-and-safety-of-the-crosser-catheter-as-a-cto-crossing-device-and-a-flossing-device
#19
Michinao Tan, Kazushi Urasawa, Ryoji Koshida, Takuya Haraguchi, Shunsuke Kitani, Yuya Nakagawa, Yasumi Igarashi, Katsuhiko Sato
The Crosser catheter is a unique device that facilitates antegrade intraluminal recanalization by high-frequency vibration energy and cavitation. We used this device not only as a chronic total occlusion (CTO) crossing device, but also as a flossing device in stenotic lesions and we also evaluated the efficacy of this device when used with both the "Crosser preceding" and the "Guidewire preceding" in CTOs. Complications related to this device were investigated, too. We retrospectively analyzed a total of 90 consecutive patients with peripheral artery disease in the femoropopliteal artery and below-the-knee artery (BTA)...
November 21, 2016: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/27867557/clinical-analysis-of-non-aids-patients-pathologically-diagnosed-with-pulmonary-cryptococcosis
#20
Kaixiong Liu, Haibo Ding, Bing Xu, Ruixiong You, Zhen Xing, Jianfeng Chen, Qichang Lin, Jieming Qu
BACKGROUND: Pulmonary cryptococcosis (PC) was not a rare infectious disease in non-AIDS patients. However, data on the immune status were lacking in southern China for comparative analysis of differences between immunocompromised and immunocompetent hosts. This study was to investigate the epidemiological, clinical, radiological, and treatment profiles for patients with PC. METHODS: We performed a retrospective review of 88 patients diagnosed with tissue-confirmed PC who were not HIV-infected from 2003 to 2013...
October 2016: Journal of Thoracic Disease
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